Microbryum davallianum

(Smith) R. H. Zander

Bull. Buffalo Soc. Nat. Sci. 32: 240. 1993,.

Basionym: Gymnostomum davallianum Smith Ann. Bot. (König & Sims) 1: 577. 1805
Synonyms: Pottia davalliana (Smith) C. Jensen
Treatment appears in FNA Volume 27. Treatment on page 629. Mentioned on page 628.

Distal laminal cells weakly convex superficially, adaxial surface of costa not mammillose. Seta elongate. Capsule cylindrical, stegocarpous but never cleistocarpous. Spores granulose, low-papillose or spiculose, large, 28–39 µm.

Distribution

V27 924-distribution-map.gif

North America, Mexico, Europe, sw Asia, Africa, Pacific Islands (New Zealand)

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Capsules commonly wide-mouthed when dehisced, with a single row of thickened cells below mouth, peristome absent, spores spiculose, 31-39 µm. Microbryum davallianum var. davallianum
1 Capsules narrow mouthed when dehisced, with usually 2 or more rows of thickened cells below mouth, peristome variously absent or present, spores merely papillose, 27-34 µm > 2
2 Peristome well developed Microbryum davallianum var. commutatum
2 Peristome rudimentary or absent Microbryum davallianum var. conicum
... more about "Microbryum davallianum"
elongate +, shortrectangular +  and quadrate +
weakly concave +  and broadly channeled +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
of 1;2 rows +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Smith) R. H. Zander +
round +  and semicircular +
papillose +  and smooth +
usually slightly wider +
usually ovate;oblong +
not differentiated +
Gymnostomum davallianum +
obovoid +
mitrate +  and conic-cucullate +
cleistocarpous +  and stegocarpous +
cylindrical +
synoicous +, paroicous +, monoicous +, sexual +  and asexual +
vesiculose +  and parenchymatous +
3 (?) +  and 6 (?) +
elongate-rhomboid +  and elongate +
enlarged +
tomentose +  and bare +
percurrent +  and excurrent +
serrulate +  and entire +
rhomboidal;shortrectangular;quadrate;hexagonal +
enlarged +  and small to somewhat +
North America +, Mexico +, Europe +, sw Asia +, Africa +  and Pacific Islands (New Zealand) +
differentiated +
multicellular +
yellow +  and orange-red or red +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
spathulate +  and ovate +
reduced +
occasionally less papillose and somewhat thicker walled +
dentate +  and entire +
papillose +
photosynthetic +
branching +, hollow +  and simple +
1 +  and 6 +
flattened +  and 2-fid +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
1 (?) +  and 2 (?) +
not differentiated +
Bull. Buffalo Soc. Nat. Sci. +
straight +
elongate +
short;elongate +
2 +  and 1 +
red +  and laminal +
rounded-triangular +  and rounded-pentagonal +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Pottia davalliana +
Microbryum davallianum +
Microbryum +
species +
ovate;short elliptical +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
ovate +, elliptical +  and lanceolate +
yellow distally and red +, orange +, red +  and yellow +
rectangular +
stemless +  and perigoniate +
brown;reddish-brown +
plant +  and gregarious +
occasionally smaller than the perichaetiate +